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@article{Iizuka2016,
  author       = {Iizuka, Satoshi and Simo{-}Serra, Edgar and Ishikawa, Hiroshi},
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  publisher = {Springer International Publishing},
  year      = {2018},
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@article{He2018,
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  journaltitle = {ACM Trans. Graph.},
  number       = {4},
  pages        = {47:1--47:16},
  volume       = {37},
  publisher    = {ACM},
  year         = {2018},
}
